Digital filter device, digital filtering method, a

专利名称：Digital filter device, digital filtering method,

and storage medium having digital filterprogram stored thereon

发明人：Atsufumi Shibayama申请号：US14900801申请日：20140620公开号：US09934199B2公开日：20180403

专利附图：

摘要：In order to reduce the power consumed when using FFT processing and filteringin the frequency domain together, a digital filter device according to the present

invention is provided with: a first filtering means for performing a first fast Fouriertransformation using a first data sorting process, first filtering in the frequency domain, afirst inverse fast Fourier transformation using a second data sorting process, and overlapremoval on a first input block including overlapped data; a second filtering means forperforming a second fast Fourier transformation, which simultaneously processes all datain a second input block including overlapped data, second filtering in the frequencydomain, a second inverse fast Fourier transformation, which simultaneously processes allreceived filtered data, and overlap removal; and a data selection means for selectingeither the first filtering means or the second filtering means, wherein the operation ofthe filtering means that is not selected by the data selection means is interrupted.

申请人：NEC Corporation

地址：Minato-ku, Tokyo JP

国籍：JP

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